CN105491037B - Protocol conversion system and process between boat-carrying Beidou II equipment and ship Ethernet - Google Patents
Protocol conversion system and process between boat-carrying Beidou II equipment and ship Ethernet Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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Abstract
The present invention relates to a kind of marine communication protocol conversion system and conversion processes, are exchanged with each other for data between boat-carrying Beidou II equipment and ship Ethernet.Protocol conversion system UART0 module is communicated for sending and receiving boat-carrying Beidou II device data；Beidou II protocol function for identification and processing Beidou II location data, device status data, syslog data, and to boat-carrying Beidou II equipment send Beidou device directive；Protocol conversion module is used to boat-carrying Beidou II device data and IEC 61162-450 normal data being packaged conversion；IEC 61162-450 protocol function is managed the physical layer of communication protocol stack, data link layer, internetwork layer, transportation level, application layer by logical device and application process, establishes communication link；Network Interface Module is established network connection with ship Ethernet and is communicated.Therefore the present invention can make boat-carrying Beidou II equipment for meeting in the ship Ethernet of IEC 61162-450 standard, to lay the foundation in ship domain application.
Description
Technical field
The present invention relates to a kind of marine communication protocol conversion system and conversion processes, are used for boat-carrying Beidou II equipment and ship
Data are exchanged with each other between oceangoing ship Ethernet.
Background technique
Boat-carrying Beidou II equipment is due to its passive location, many merits such as positioning accuracy is high, real-time is good, in ship neck
Domain obtains more and more extensive use.But since the communication standard of boat-carrying Beidou II equipment uses " Beidou satellite navigation system
User terminal universal data interface ", the standard disunity of this standard and ship Ethernet, to the use of boat-carrying Beidou II equipment
Inconvenience is caused, while also increasing difficulty of construction and management cost.
It is IEC 61162-450 (" sail and wireless telecom equipment and system that ship Ethernet, which executes standard, at present
Data-interface " Part 450: the interconnection of the Ethernet of multi-party call device and receiver), without defining boat-carrying Beidou two in standard
Ship Ethernet how is accessed for equipment, causes boat-carrying Beidou II equipment access ship Ethernet difficult.Especially existing
IMO the Maritime Safety committee of International Maritime Organization resolution MSC.379 (93) in about " boat-carrying BDS(Beidou) receiving device
Requirement has to comply with the interface requirement of IEC 61162 in energy standard ".And the existing sea IEC 61162-1 and IEC 61162-2(
Upper navigation and radio communication equipment and system digital interface part 1: single session device and more receivers) it defines based on serial ports number
According to format, the method for not providing boat-carrying Beidou II equipment access ship Ethernet in the standard of corresponding IEC 61162-450,
Wanting for IEC 61162-450 standard is unable to satisfy using the solution that common serial-port communication is converted with ethernet communication
It asks.
For these reasons, it needs a kind of protocol conversion device and method to solve the above problems, is set for boat-carrying Beidou II
The standby extensive use in ship domain lays the foundation.
Summary of the invention
The object of the present invention is to provide one kind for boat-carrying Beidou II device data acquisition, transmission and connection ship ether
The communication Protocol Conversion system of net, so that boat-carrying Beidou II equipment can be used in meeting IEC 61162-450 standard at present
Ship Ethernet.
It is a further object of the present invention to provide a kind of protocol conversion process of above-mentioned protocol conversion system.
To realize above-mentioned first purpose, the invention provides the following technical scheme:
A kind of protocol conversion system suitable for being interconnected between boat-carrying Beidou II equipment and ship Ethernet, comprising:
UART0 module meets Beidou satellite navigation system user terminal universal data interface standard for sending and receiving
Data, using RS422 standard and boat-carrying Beidou II device talk；
Beidou II protocol function, according to Beidou satellite navigation system user terminal universal data interface standard into
Row building handles boat-carrying Beidou II device talk data, including command frame establishment, data frame analyzing and encapsulation；
Protocol conversion module will meet the boat-carrying Beidou of Beidou satellite navigation system user terminal universal data interface standard
Two generation device datas are mutually converted with the data for meeting IEC 61162-450 standard；
IEC 61162-450 protocol function is constructed according to IEC 61162-450 standard, realizes IEC
Function specified in 61162-450 standard, the scheduling function related to management, communications protocol including program circuit each in logical device
The realization of energy；
Network Interface Module is taken for sending and receiving data as defined in IEC 61162-450 standard using UDP multicast
Business agreement is communicated on the ship Ethernet for meeting IEC 61162-450 standard.
The UART0 module includes data reception module 0, data transmission blocks 0 and timer 0；
The data reception module 0, the segmented mode in give the complete data frame received to Beidou II function mould
Block is handled；
The data of Beidou II data frame package module are sent to ship using inquiry mode by the data transmission blocks 0
Carry Beidou II equipment；
The timer 0, for judging time-out between data frame byte.
The Beidou function module encapsulates two module compositions by Beidou II data frame analyzing, Beidou II data frame；
The Beidou II data frame analyzing module is according to Beidou satellite navigation system user terminal universal data interface mark
Standard carries out data frame analyzing, and entrance is the output end of data reception module 0, and when data frame analyzing exception will generate error logging
And system log is generated, Beidou is sent by the data for meeting Beidou satellite navigation system user terminal universal data interface standard
In two generations, turned IEC 61162-450 Data Identification module；
The Beidou II data frame package module is according to Beidou satellite navigation system user terminal universal data interface mark
Standard is identified that entrance is the output end that IEC 61162-450 turns Beidou II Data Identification module, and generation meets
The data of NMEA0183 reference format；The data hair of Beidou satellite navigation system user terminal universal data interface standard will be met
It is sent to data transmission blocks 0.
The protocol conversion module turns IEC61162-450 Data Identification by Beidou II and IEC 61162-450 turns Beidou
Two codes or datas identify two module compositions；
The Beidou II, which turns IEC61162-450 Data Identification module, will meet Beidou satellite navigation system user terminal
The data of universal data interface standard are converted to the data of IEC61162-450 reference format, and protocol conversion process is as follows:
Input data abides by Beidou satellite navigation system user terminal universal data interface standard, and wherein navigation information frame seals
Dress is packaged according to IEC61162-450 standard Appendix B regulation, TAG block are as follows:
" UdPbC t:MMSI, c:UTC, s:Source-identification, n:Line-count *
Checksum\"；
Wherein: " MMSI " indicates Waterborne movable communication service identification code, " c ": indicate the time, " UTC " indicates UTC time,
In seconds, " Checksum " indicates check code；
The ship Ethernet for meeting IEC61162-450 standard is sent data to using UDP multicast service；
The function that the IEC61162-450 of the protocol conversion module turns Beidou II Data Identification module is will to meet IEC
The data of 61162-450 standard are searched according to the regulation of Beidou satellite navigation system user terminal universal data interface standard
And conversion, it is sent to Beidou II data frame package module.
The IEC 61162-450 protocol function includes three parts: logical device, application process module and standard
Communication protocol stack；
All objects are all put into logical device by the logical device only with a logic management equipment, packet
Include functional object and data object；
The application process module completes the function of IEC 61162-450 standard, including IEC 61162-450 normal data
Processing, management logical device information, each service primitive of response, if these service primitives meet IEC 61162-450 standard
It then gives communication protocol stack to send, otherwise gives protocol conversion module and handled；
The communication protocol stack uses the system protocol stack structure of five layer protocols, and communication protocol stack completes the envelope of communication protocol
Dress, including five application layer, transportation level, network layer, data link layer, physical layer protocol layers complete establishment of connection, communication number
It is detected according to the coding and parsing, the encapsulation of complete data frame, frame check and frame format and time-out of frame.
The IEC 61162-450 protocol function uses customized extension specified in IEC 61162-450 standard,
Multicast group NAVD, the port multicast address 239.192.0.4 60004, navigation information frame envelope is added in customized Beidou navigation information BD
The Beidou II location data processing information that dress is sent carries out multicast on NAVD.
The IEC 61162-450 protocol function, system log provide to use according to IEC 61162-450 standard
UDP multicast service carries out multicast, multicast address 239.192.0.254, port 514.
The IEC 61162-450 protocol function, according to the rule of customized extension in IEC 61162-450 standard
Fixed, definition Beidou state BDZT is multicast group #, multicast address 239.192.0.9, port 60009, equipment state frame
The boat-carrying Beidou II device status information that encapsulation is sent carries out multicast on BDZT.
The Network Interface Module includes data transmission blocks 1, data reception module 1 and timer 1；
The data receiver of the data reception module uses interrupt mode, and the ship Ethernet data received is conveyed to
Communication protocol stack carries out subsequent processing；
The data of the data transmission blocks, which are sent, uses inquiry mode, by the data of communication protocol stack be sent to it is peculiar to vessel with
Too net；
The timer, for time-out between judgment frame byte.
In order to realize the second purpose, the invention provides the following technical scheme:
Protocol conversion process of the invention is as follows:
The communication process of IEC 61162-450 standard is to need to establish an application before a communication using UDP multicast formula
Connection, when protocol conversion system connects boat-carrying Beidou II equipment and ship Ethernet, communication process starts, entire communication stream
Journey is as follows:
The first step, which is established, applies connection procedure,
Step 1: after protocol conversion system accesses ship Ethernet, physical layer connection is first established；
Step 2: physical layer establishes system generated data response command after connection and issues consultative management process, consultative management into
Data frame is sent after journey response command establishes data link layer connection；
Step 3: consultative management process sends commands to internetwork layer connection after data link layer connection is established, according to this agreement
The IP address of converting system configuration establishes internetwork layer connection；
Step 4: internetwork layer connection sends data response command to consultative management process after establishing, consultative management process is sent
Transportation level connection is established in order, this converting system is communicated using UDP multicast protocol；
Step 5: transportation level connection sends data response command to consultative management process after establishing, consultative management process is sent
Application layer connection is established in order；
Step 6: application layer connection sends data response command to consultative management process after establishing, consultative management process is sent
Instruction shows the data communication that can be normally carried out protocol conversion system to application process；
Second step establishes data communication process,
What data communication process must carry out under the premise of establishing using connection；
(1) data protocol of boat-carrying Beidou II device data to ship Ethernet is converted,
Step 1: boat-carrying Beidou II equipment sends data frame through the reception of UART0 receiving module, Beidou II protocol function
Module carries out data frame analyzing, protocol conversion module gives application process after carrying out data conversion；
Step 2: application process passes through communication protocols using UDP communication protocol according to the regulation of IEC 61162-450 standard
It discusses stack and ship Ethernet is sent data to by Network Interface Module；
(2) data protocol of ship Ethernet data to boat-carrying Beidou II equipment is converted,
Step 1: Network Interface Module receives the data of ship Ethernet, is transmitted to application process by communication protocol stack,
Application process carries out data parsing according to the regulation of IEC 61162-450 standard；
Step 2: the data handled are transferred to protocol conversion module to carry out data conversion, the data converted by application process
It transfers to Beidou II protocol function to carry out data frame encapsulation, and boat-carrying Beidou II is sent to by UART0 sending module
Equipment.
Provided by the present invention for boat-carrying Beidou II equipment and ship ethernet communication protocol converting system and its conversion
Process, applied to meet " Beidou satellite navigation system user terminal universal data interface " standard boat-carrying Beidou II equipment and
Between the system for meeting the two different specifications of the ship Ethernet of IEC61162-450 standard, so that the two different specifications
Normal data exchange can be carried out between system.Therefore the present invention can make current boat-carrying Beidou II equipment for meeting
In the ship Ethernet of IEC61162-450 standard, to be established for boat-carrying Beidou II equipment in the popularization and application of ship domain
Basis.
Detailed description of the invention
Fig. 1 is protocol conversion system hardware block diagram of the present invention；
Fig. 2 is protocol conversion system functional block diagram of the present invention；
Fig. 3 is the structure chart of protocol conversion system IEC 61162-450 functional module communication protocol stack of the present invention；
Fig. 4 is protocol conversion system IEC 61162-450 UDP multi-case data format of the present invention.
Specific embodiment
There are two PORT COM, a PORT COM is used for and meets that " big-dipper satellite is led protocol conversion system of the present invention tool
Navigate system user terminal universal data interface " standard boat-carrying Beidou II device talk；Another PORT COM with use IEC
The ship Ethernet of 61162-450 standard is communicated.Thus meeting " the general number of Beidou satellite navigation system user terminal
According to interface " the boat-carrying Beidou II equipment of standard and meet the two communication systems of the ship Ethernet of IEC61162-450 standard
It connects, being allowed to two systems realizes data exchange.To realize present invention technical purpose to be achieved.
As shown in Figure 1, protocol conversion system of the invention includes power module, MCU, memory, reseting module, UART0
And network interface.
Power module provides power supply for protocol conversion system modules.
MCU is the core for connecting the protocol conversion system of boat-carrying Beidou II equipment and ship Ethernet, for executing
Program code completes protocol conversion function.
Memory is used to store the program and configuration information of protocol conversion system, including IP address, serial communication baud rate
Etc. information.
Reseting module uses the generation reset signal when program breaks down that can restart the hardware watchdog of system, utilizes one
A timer circuit, timing output are connected to the reset terminal of circuit, and program resets timer within certain time, because
When this program works normally, timer cannot always overflow, and cannot also generate reset signal, if program breaks down, not exist
House dog is resetted in timing cycle, allows for WatchDog Timer and overflow generating reset signal and laying equal stress on starting system.
UART0 uses serial data communication mode, carries out full-duplex communication using RS422 interface here, and RS422 interface is pressed
It is constructed according to TIA/EIA-422-A standard.
Network interface is constructed according to IEEE802.3 standard, is connected to ship Ethernet by RJ45 interface.
As shown in Fig. 2, the protocol conversion system of connection boat-carrying Beidou II equipment and ship Ethernet is divided into 5 moulds
Block is divided into: UART0 module, Beidou function module, protocol conversion module, IEC61162-450 protocol function, network interface
Module is illustrated respectively below.
1, UART0 module
The function of this module is exactly to send and receive boat-carrying Beidou II device package, i.e., is connect by UART0 in attached drawing 1
Mouth uses binary system Stream Data Transmission ASCII, it includes data reception module 0, data transmission blocks 0 and timer 0.
(1) data reception module 0 uses interrupt mode, and data reception module gives the complete data frame received to Beidou
Two codes or data frame parsing modules carry out subsequent processing；
(2) data transmission blocks 0 use inquiry mode, and data transmission blocks are responsible for Beidou II data frame package module
The data sent are sent to boat-carrying Beidou II equipment；
(3) timer 0 is for time-out between judgment frame byte.
2, Beidou II protocol function
The major function of Beidou II protocol function is processing boat-carrying Beidou II device talk data, according to " north
Struggle against satellite navigation system user terminal universal data interface " standard building, by Beidou II data frame analyzing, Beidou II data
Frame encapsulates two module compositions.
(1) Beidou II data frame analyzing module
The entrance of this module are as follows: the output end of the data reception module of UART0, according to " Beidou satellite navigation system user
Terminal universal data interface " standard carries out data frame analyzing, and error logging will be generated when data frame analyzing exception and will generate system
Log；
The outlet of this module are as follows: meet the data of Beidou satellite navigation system user terminal universal data interface standard, send out
It is sent to the input terminal that Beidou II turns IEC61162-450 Data Identification module；
(2) Beidou II data frame package module
The entrance of this module is the output end that IEC61162-450 turns Beidou II Data Identification module, according to " Beidou is defended
Star navigation system users terminal universal data interface " standard identified, the data for meeting NMEA0183 reference format are generated,
0183 standard of NMEA is National Marine Electronics association (National Marine Electronics Association)
The reference format formulated for sea electronic equipment.；
The outlet of this module is the data hair that will meet Beidou satellite navigation system user terminal universal data interface standard
It is sent to the input terminal of UART0 data transmission blocks.
3, protocol conversion module
The function of protocol conversion module is according to " Beidou satellite navigation system user terminal universal data interface " standard lookup
The data of mark are provided in IEC61162-450 standard, and notebook data is converted to and meets " Beidou satellite navigation system user's end
Hold universal data interface " standard data；It is defined " Beidou satellite navigation system user terminal universal data interface " is met
Data are rebuild according to IEC61162-450 standard.This module by Beidou II turn IEC61162-450 Data Identification and
IEC61162-450 turns two module compositions of Beidou II Data Identification.
(1) Beidou II turns IEC61162-450 Data Identification module
The function of this module is will to meet that " Beidou satellite navigation system user terminal is logical in boat-carrying Beidou II device data
With data-interface " data of standard are converted to the data of IEC 61162-450 reference format.
The entrance of this module: the output end of Beidou II data frame analyzing module, data format are NMEA0183 standard.
The outlet of this module: the input terminal of the application process module of IEC 61162-450 protocol function.
(2) IEC61162-450 turns Beidou II Data Identification module
The function of this module is the data by IEC 61162-450 reference format according to " Beidou satellite navigation system user
Terminal universal data interface " standard searched and converted, to be supplied to boat-carrying Beidou II equipment.
The entrance of this module: the output end of the application process module of IEC 61162-450 protocol function.
The outlet of this module: data issue the input terminal of Beidou II data frame package module, and data format is
NMEA0183 standard.
4, IEC 61162-450 protocol function
IEC 61162-450 protocol function is constructed according to IEC61162-450 standard, is to support this standard
Nucleus module, major function are the correlation function of completion IEC61162-450 standard, including in logical device and equipment respectively
Scheduling and management, the realization of communications protocol correlation function of program circuit etc..IEC 61162-450 protocol function includes three
A part: logical device, application process module and standard communication protocol stack.
(1) logical device
Protocol conversion system according to the present invention is the building that equipment is completed by object-oriented data model,
This protocol conversion system manages all logical device only with a logical device, and all objects are all put into logic and are set
In standby, including functional object and data object, these objects construct the data mould of IEC 61162-450 protocol function jointly
Type.
(2) application process module
This module is to complete the nucleus module of IEC 61162-450 standard, and task includes IEC 61162-450 standard rule
The processing of fixed number evidence, management logical device information, each service primitive of response.If these service original statements are and IEC
61162-450 standard is relevant, transfers to give communication protocol stack and sends, and otherwise gives protocol conversion module and is handled.
(3) communication protocol stack
Communication protocol stack uses the system protocol stack structure of five layer protocols, and communication protocol stack completes the envelope of communication protocol
Dress, including five application layer, transportation level, network layer, data link layer, physical layer protocol layers mainly include establishment of connection, logical
The coding and parsing, the encapsulation of complete data frame, frame check and frame format of letter data frame and time-out detection etc..Communication protocol
Stack specific structure is as shown in Figure 4.
5, Network Interface Module
The major function of Network Interface Module is to send and receive IEC 61162-450 standard Protocol Data packet, i.e., two into
Flow data processed.It includes data transmission blocks 1, data reception module 1 and timer 1.
(1) data reception module 1
Data receiver uses interrupt mode, carries out subsequent place for communication protocol stack is transmitted to after taken-over vessel Ethernet data
Reason；
(2) data transmission blocks 1
Data, which are sent, uses inquiry mode, is responsible for the number of IEC61162-450 standard agreement functional module communication protocol stack
According to being sent to Ethernet peculiar to vessel.
(3) timer 1
Timer 1 is used for time-out between judgment frame byte；
As shown in figure 3, the protocol conversion process of above-mentioned protocol conversion system is as follows:
The communication process of IEC 61162-450 standard is to need to establish an application before a communication using UDP multicast formula
Connection.When protocol conversion system accesses ship Ethernet, communication process starts.Entire communication process is as follows:
1, it establishes and applies connection procedure
Step 1: first establishing physical layer connection after protocol conversion system access ship Ethernet；
Step 2: system generated data response command issues consultative management process, consultative management after physical layer establishes connection
Data frame is sent after process response command establishes data link layer connection；
Step 3: consultative management process sends commands to internetwork layer connection after data link layer connection is established, according to this association
The IP address for discussing converting system configuration establishes internetwork layer connection；
Step 4: internetwork layer connection sends data response command to consultative management process, consultative management process hair after establishing
Transportation level connection is established in order of losing one's life, this converting system is communicated using UDP multicast protocol；
Step 5: transportation level connection sends data response command to consultative management process, consultative management process hair after establishing
Application layer connection is established in order of losing one's life.
Step 6: application layer connection sends data response command to consultative management process, consultative management process hair after establishing
It send instruction to application process, shows the data communication that can be normally carried out protocol conversion system.
2, data communication process
What data communication process must carry out under the premise of establishing using connection.
(1) data protocol of boat-carrying Beidou II device data to ship Ethernet is converted
Step 1: boat-carrying Beidou II equipment sends data frame through the reception of UART0 receiving module, Beidou II protocol function
Module carries out data frame analyzing, protocol conversion module gives application process after carrying out data conversion；
Step 2: regulation of the application process according to IEC 61162-450 standard passes through communication protocols using UDP communication protocol
It discusses stack and ship Ethernet is sent data to by network interface service module.
(2) data protocol of ship Ethernet data to boat-carrying Beidou II equipment is converted
Step 1: network interface service module receives the data of ship Ethernet, application is transmitted to by communication protocol stack
Process, application process carry out data parsing according to the regulation of IEC 61162-450 standard.
Step 2: the data handled are transferred to protocol conversion module to carry out data conversion, the number converted by application process
According to transferring to Beidou II protocol function to carry out data frame encapsulation, and boat-carrying Beidou two is sent to by UART0 sending module
For equipment.
As shown in figure 4, when Beidou II location data is handled to navigation information frame encapsulation according to " Beidou satellite navigation system
User terminal universal data interface " standard transmission location information data, data fit NMEA0183 standard, such as:
“$BDGGA,123519,4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,
M,,*47<0x0D><0x0A>”
The encapsulation of navigation information frame is encapsulated according to IEC 61162-450 standard and its Appendix B regulation.TAG block is
" UdPbC t:MMSI, c:UTC, s:Source-identification, n:Line-count * Checksum "
Wherein: " MMSI " indicates Waterborne movable communication service identification code, " c ": indicating the time；" UTC " indicates UTC time,
In seconds." Checksum " indicates check code.
Encapsulation of data are as follows:
" UdPbC t:412607000, c:1424893517, s:BD0001, n:987*20 $ GPGGA, 123519,
4807.038,N,01131.000,E,1,08,0.9,545.4,M,46.9,M,,*47<0x0D><0x0A>”
Wherein:
" UdPbC " is that multicast as defined in IEC 61162-450 agreement indicates symbol；
" t " indicates text in " t:412607000 ", and " 412607000 " indicate Waterborne movable communication service identification code
MMSI；
" c " indicates the time in " c:1424893517 ", and " 1424893517 " indicate UTC time, corresponding Beijing time
"2015/2/26 3:45:17"；
" s " indicates information source in " s:BD0001 ", and " BD " indicates boat-carrying Beidou II equipment, " 0001 " order of representation
Number；
" n " indicates line number in " n:987 ", and " 987 " indicate line number value, there is identical identifier (such as " $ GPGGA ") information frame
Statement line numerical value output is recycled from 0 to 999；
" * " is separator in " n:987*20 "；
" 20 " are cyclic redundancy check in " n:987*20 ".
UDP multicast service sends data to ship Ethernet.
When the processing of boat-carrying Beidou II device status data is according to " Beidou satellite navigation system user terminal general data connects
Mouthful " standard to equipment state frame encapsulate transmit and receive status information data, such as:
“$BDBSI,3,4,0,2,0,0,3,5,0,0,0,0*5D <0x0D><0x0A>”
The encapsulation of equipment state frame is encapsulated according to IEC61162-450 standard regulation, and wherein TAG and navigation information frame seal
The TAG data format of dress is identical, data after encapsulation are as follows:
" UdPbC t:412607000, c:1424893517, s:BD0001, n:453*24 $ BDBSI, 3,4,0,2,
0,0,3,5,0,0,0,0*5D<0x0D><0x0A>”
The encapsulation of boat-carrying Beidou II device directive is advised according to " Beidou satellite navigation system user terminal universal data interface "
Surely station-keeping mode is sent to boat-carrying Beidou II terminal device by sending module and data is set, such as:
“$CCMSS,Z,2,B1,A,B3,P,,*36<0x0D><0x0A>”
The error reporting of the Beidou II functional module captured is sent error log by error reporting, according to IEC
The regulation generation error log of 4.3.3 is as follows in 61162-450:
“1311 20150204T23:10:20-01:00 192.168.103.250 450-BDT - 102 – data
header error”
The encapsulation of system log frame is encapsulated according to IEC 61162-450 standard regulation, and wherein TAG and navigation information frame seal
The TAG formatted data of dress is identical, and data are after encapsulation
" UdPbC t:412607000, c:1467543517, s:BD0001, n:187*2F 1,311 20150204
T23:10:20-01:00 192.168.103.250 450-BDT - 102 – data header error”
Table 1 lists Beidou II location information UDP multicast service address.
Table 1
Using customized extension in IEC 61162-450, customized BD(Beidou navigation information) multicast group NAVD is added, it is more
Broadcast the address port 239.192.0.4 60004.The Beidou II location data processing information that the encapsulation of navigation information frame is sent is in NAVD
Upper carry out multicast.
Table 2 lists boat-carrying Beidou II device status information UDP multicast service address.
Table 2
Using customized extension in IEC 61162-450, it is defined as BDZT(Beidou state) multicast group #, multicast address
239.192.0.9 port 60009.The boat-carrying Beidou II device status information that equipment state frame encapsulation 232 is sent is on BDZT
Carry out multicast.
Table 3 lists boat-carrying Beidou II device log multicast service address.
Table 3
Boat-carrying Beidou II device Errors log is encapsulated by system log frame, is according to regulation in IEC61162-450 standard
The requirement for log multicast group of uniting carries out multicast by UDP multicast service on the port multicast address 239.192.0.254 514.
Claims (1)
1. a kind of protocol conversion process suitable for the protocol conversion system between boat-carrying Beidou II equipment and ship Ethernet,
It is characterized in that, the protocol conversion process is as follows:
The communication process of IEC 61162-450 standard is to be needed to establish an application before a communication using UDP multicast formula and connected
It connects, when protocol conversion system connects boat-carrying Beidou II equipment and ship Ethernet, communication process starts, entire communication process
It is as follows:
The first step, which is established, applies connection procedure,
Step 1: after protocol conversion system accesses ship Ethernet, physical layer connection is first established；
Step 2: system generated data response command issues consultative management process after physical layer establishes connection, and consultative management process is rung
Data frame is sent after should ordering establishes data link layer connection；
Step 3: consultative management process sends commands to internetwork layer connection after data link layer connection is established, according to this protocol conversion
The IP address of system configuration establishes internetwork layer connection；
Step 4: internetwork layer connection sends data response command to consultative management process after establishing, consultative management process sends order
Transportation level connection is established, this converting system is communicated using UDP multicast protocol；
Step 5: transportation level connection sends data response command to consultative management process after establishing, consultative management process sends order
Establish application layer connection；
Step 6: application layer connection sends data response command to consultative management process after establishing, consultative management process sends instruction
To application process, show the data communication that can be normally carried out protocol conversion system；
Second step establishes data communication process,
What data communication process must carry out under the premise of establishing using connection；
(1) data protocol of boat-carrying Beidou II device data to ship Ethernet is converted,
Step 1: boat-carrying Beidou II equipment sends data frame through the reception of UART0 receiving module, Beidou II protocol function
Carry out data frame analyzing, protocol conversion module gives application process after carrying out data conversion；
Step 2: application process passes through communication protocol stack using UDP communication protocol according to the regulation of IEC 61162-450 standard
Ship Ethernet is sent data to by Network Interface Module；
(2) data protocol of ship Ethernet data to boat-carrying Beidou II equipment is converted,
Step 1: Network Interface Module receives the data of ship Ethernet, is transmitted to application process by communication protocol stack, applies
Process carries out data parsing according to the regulation of IEC 61162-450 standard；
Step 2: the data handled are transferred to protocol conversion module to carry out data conversion by application process, and the data converted are transferred to
Beidou II protocol function carries out data frame encapsulation, and is sent to boat-carrying Beidou II equipment by UART0 sending module.
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| CN108111992A (en) * | 2017-12-23 | 2018-06-01 | 北京卫星信息工程研究所 | A kind of split type boat-carrying admittance equipment and its data processing method |
| CN110381046B (en) * | 2019-07-10 | 2021-12-07 | 广东星舆科技有限公司 | GNSS data encryption transmission method |
| CN110794826B (en) * | 2019-09-24 | 2023-10-20 | 北京旷视机器人技术有限公司 | Hybrid navigation method and device, communication method and device, equipment and storage medium |
| CN111585999B (en) * | 2020-04-28 | 2022-03-29 | 深圳震有科技股份有限公司 | Data conversion method, system and storage medium |
| CN112116201B (en) * | 2020-08-11 | 2021-07-06 | 长江三峡通航管理局 | Method for acquiring and processing navigation operation data of ship lock |
| CN112019256A (en) * | 2020-08-28 | 2020-12-01 | 深圳市青柠互动科技开发有限公司 | Gateway device and satellite ground station system |
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| CN201039202Y (en) * | 2007-04-24 | 2008-03-19 | 武汉理工大学 | Multi-channel standard data receiver for boat |
| CN101277299A (en) * | 2008-05-13 | 2008-10-01 | 珠海中慧微电子有限公司 | Protocol conversion system and protocol conversion process |
| CN101820417A (en) * | 2010-03-05 | 2010-09-01 | 威胜集团有限公司 | Development system of interoperability electricity communication protocol |
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| CN201039202Y (en) * | 2007-04-24 | 2008-03-19 | 武汉理工大学 | Multi-channel standard data receiver for boat |
| CN101277299A (en) * | 2008-05-13 | 2008-10-01 | 珠海中慧微电子有限公司 | Protocol conversion system and protocol conversion process |
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